Electric helix and method of winding the same



Patent-ed Apr. 8; 1884.

(No Model.)

F. BAIN.

ELECTRIC HELIX AND METHOD OF WINDING THE-SAME. No. 296.380.

UNITE STATES Arnsr rrrcn.

ronnn BAIN, or MINNEAPOLIS, MINNESOTA, ASSIGNOR TO THE RAIN ELECTRIC COMPANY, or CHICAGO, ILLINOIS.

ELECTRIC HELIX AND METHOD OF WINDING THE SAME.

SPECIFICATION forming part of Letters Patent No. 296,380, dated April 8, 1884:.

Application filed December 30, 1882. (No model.)

To aZZ whom it may concern:

Be It known that I, FOREE BAIN, a citizen I of the United States, residing at'Minneapolis,

Hennepin county, Minnesota, have invented new and useful Improvements in Electric Helices and Method of WVinding Same, of which the following is a specification.

My invention relates to certain improvements in electric helices or coils and the method of winding the same.

Prior to my invention it has been customary to obtain ready access to the beginning end of the wire in making connections by passing such end before beginning the coil through the head of the spool. It has also been customary in some instances to connect such end to a thin metallic strip by solder, and have such strip lie against the inside end of the spool,

thus occupying less space than is the case when winding in another well-known manner-to wit, in passing the end of the wire up across the coilswhich1ast-named method is especially objectionable on account of the liability of short-circuiting the other coils on account of passing, as it would, such coils at right angles. The objections to the two methods first described are well understood by those familiar with electrical instruments, and consists in the liability of breakage and the inability of securing the break without uncoiling the entire spool. It has been suggested in the literature upon the subject of winding helices to wind a series of disks upon the core at right angles to the axis of the spiral; but this involves the necessity of winding one disk from the inside to the outside, and the next from the outside to the inside, requiring very great dexterity in the manipulation of the wire.

The object of my invention is to avoid all of the difficulties enumerated, and at the same time present both the ends of the wire on the outside of the coils, so that they are not only readily accessible, but in the event of breakage either end may be partially uncoiled to provide a new or lengthened end, as will be more fully explained hereinafter.

My invention therefore consists in the peculiar method of coiling the wire so as to present both ends [externally without changing the direction of the coil, as will be more fully set forth; and my invention further consists of a helix for electrical instrumentswound according to my improved method, with both ends presented on the outside of the coils, as a new-article of manufacture.

In the accompanying drawings, Figure 1 is' a perspective view of a spool,showing the first step in the method of winding; Fig. 2, asimilar view showing the beginning of the second step; Fig. 3, a similar view showing the completed article; and Fig. 4, a longitudinal central section of a spool, showing a modification of my invention; also cross-section of same.

Similar letters indicate like parts in the several figures.

A represents an ordinary spool, around the barrel of which the wire is to be coiled. I first coil the beginning end B of the wire at one end of the spool upon itself,coil on coil, until it is built up to the required height, and leaving such end exposed, as clearly seen at Fig. l. I then coil the wire B upon the spool, in the ordinary way, between the built-up portion B and the opposite end of the spool, as clearly shown at Figs. 2 and 3, until completed, as shown at Fig. l, where it will be observed that both ends B and B lie on the outside and are readily accessible, and that in the event of any breakage of such ends, as frequently occurs in continued handling, the beginning end B may be readily unwound to the extent of one or more of its coils, to furnish additional wire for connection, without in the least disturbing the coils of the remaining por- I tion B of the wire. The final end of the wire is obviously free of access andreadily unwound. I11 beginning, the method of winding the coils built up from the beginning end B of the wire may be sustained in position during the remainder of the method of winding by cementing said firstcoils to the head of the spool by any suitable glutinous substance; or, if desired, a separate disk head or partition, 0, Fig. 5, may be employed, as clearly represented in the drawings. \Vhen such partition is used, it maybe rigid or movable, and is provided at its inner circumference with an orifice, a, for the passage of the wire with which the final coils are made.

steps taken in winding, as the final end may be wound first, taking care to leave the space necessary for the beginning-end coils; but I of course prefer the more systematic and practical course of winding in the order already explained; nor do I wish to confine myself to winding a single disk as the initial step to the subsequent winding of the remaining portion, or Vice versa, for it will be readily understood that I may wind from the center of the spool or core toward each end, so that the coils will have the same general direction and be composed of a single continuous wire, with both ends terminating on top.

hat I claim as new, and desire to secure by Letters Patent, is-

1. The method herein described of winding an electric helix, consisting in winding a small portion of the helix from the core outward until said portion is completed and the end of the wire lies at the top, and then winding the remaining portion of the helix with the other end of the wire from the core outward, and leaving said final or second end also on top, substantially as and for the purpose set forth.

2. The method, substantially as hereinbe fore described, of winding an electric helix, which consists in winding one coil with the layers superposed and leaving the end of the wire on top, and then winding the remaining coils and leaving the end of the wire on top.

8. An electric helix composed of a continuous wire, one coil of which has the consccutive layers of wire superposed and the end left on top, and the remainder of the wire wound in the usual way with the end left outside the coils, substantially as described.

In testimony whereof I have hereunto set my hand in'the presence of two subscribing witnesses.

FO'RlGE BAIN.

XVitncsses:

F. L. Bnownn, A. 13. BRowNin. 

